39112221111221 has 2 divisors, whose sum is σ = 39112221111222. Its totient is φ = 39112221111220.

The previous prime is 39112221111193. The next prime is 39112221111239. The reversal of 39112221111221 is 12211112221193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29524769668900 + 9587451442321 = 5433670^2 + 3096361^2 .

It is an emirp because it is prime and its reverse (12211112221193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39112221111221 - 2¹⁰ = 39112221110197 is a prime.

It is a super-2 number, since 2×39112221111221² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39112221111281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19556110555610 + 19556110555611.

It is an arithmetic number, because the mean of its divisors is an integer number (19556110555611).

Almost surely, 2^{39112221111221} is an apocalyptic number.

It is an amenable number.

39112221111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

39112221111221 is an equidigital number, since it uses as much as digits as its factorization.

39112221111221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 29.

The spelling of 39112221111221 in words is "thirty-nine trillion, one hundred twelve billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".